Refactor dockerfile
Refactor dockerfile

* Break RUN sections
* Removed superfluous commands
* Exposed port 40001 by default
* Use pip to install requirements (don't clone dependencies)

tomashaber/raiden,tomashaber/raiden,charles-cooper/raiden,tomaaron/raiden,tomashaber/raiden,charles-cooper/raiden,tomaaron/raiden,tomaaron/raiden,hackaugusto/raiden,tomaaron/raiden,tomashaber/raiden,hackaugusto/raiden,tomashaber/raiden